| Dimensions | Test Statistic | P value |
| Accuracy | U = 238.00 | 0.30 |
| References | U = 341.00** | <0.001 |
| Style/ Readability | U = 95.00** | <0.004 |
| Overall Judgment | U = 218.00 | 0.28 |
| Overall Quality Score | U = 153.00 | 0.44 |
*p<0.05, **p<0.01. U = Mann Whitney U test statistic.
Table 5.11 Comparison of article characteristics between Wikipedia and alternative encyclopaedias in the Social Sciences.
In Mathematics, Physics and Life Sciences, Wikipedia scored significantly higher on references as compared to the alternative encyclopaedias (see Tables 5.4 and 5.12). There were no differences between Wikipedia and the alternative encyclopaedias on accuracy, style/ readability, overall judgment and overall quality score.
| Dimensions | Test Statistic | P value |
| Accuracy | U = 191.00 | 0.37 |
| References | U = 230.00* | 0.03 |
| Style/ Readability | U = 130.00 | 0.32 |
| Overall Judgment | U = 206.00 | 0.17 |
| Overall Quality Score | U = 198.00 | 0.27 |
*p<0.05, **p<0.01. U = Mann Whitney U test statistic.
Table 5.12 Comparison of article characteristics between Wikipedia and alternative encyclopaedias in Mathematics, Physics and Life Sciences.
In the Medical Sciences, Wikipedia scored significantly higher on accuracy, references and overall judgment as compared to the alternative encyclopaedias (see Tables 5.4 and 5.13). There were no differences between Wikipedia and the alternative encyclopaedias on style/ readability and overall quality score.
| Dimensions | Test Statistic | P value |
| Accuracy | U = 384.00** | 0.001 |
| References | U = 409.00** | <0.001 |
| Style/ Readability | U = 245.00 | 0.94 |
| Overall Judgment | U = 359.50** | 0.006 |
| Overall Quality Score | U = 299.50 | 0.10 |
*p<0.05, **p<0.01. U = Mann Whitney U test statistic.
Table 5.13 Comparison of article characteristics between Wikipedia and alternative encyclopaedias in the Medical Sciences.
34
